libmpcodecs/vf_il.c

   1 /*
   2  * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25 #include <assert.h>
  26
  27 #include "mp_msg.h"
  28 #include "img_format.h"
  29 #include "mp_image.h"
  30 #include "vf.h"
  31 #include "libvo/fastmemcpy.h"
  32
  33
  34 //===========================================================================//
  35
  36 typedef struct FilterParam{
  37         int interleave;
  38         int swap;
  39 }FilterParam;
  40
  41 struct vf_priv_s {
  42         FilterParam lumaParam;
  43         FilterParam chromaParam;
  44 };
  45
  46 /***************************************************************************/
  47
  48 static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dstStride, int srcStride, int interleave, int swap){
  49         const int a= swap;
  50         const int b= 1-a;
  51         const int m= h>>1;
  52         int y;
  53
  54         switch(interleave){
  55         case -1:
  56                 for(y=0; y < m; y++){
  57                         fast_memcpy(dst + dstStride* y     , src + srcStride*(y*2 + a), w);
  58                         fast_memcpy(dst + dstStride*(y + m), src + srcStride*(y*2 + b), w);
  59                 }
  60                 break;
  61         case 0:
  62                 for(y=0; y < m; y++){
  63                         fast_memcpy(dst + dstStride* y*2   , src + srcStride*(y*2 + a), w);
  64                         fast_memcpy(dst + dstStride*(y*2+1), src + srcStride*(y*2 + b), w);
  65                 }
  66                 break;
  67         case 1:
  68                 for(y=0; y < m; y++){
  69                         fast_memcpy(dst + dstStride*(y*2+a), src + srcStride* y     , w);
  70                         fast_memcpy(dst + dstStride*(y*2+b), src + srcStride*(y + m), w);
  71                 }
  72                 break;
  73         }
  74 }
  75
  76 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
  77         int w;
  78         FilterParam *luma  = &vf->priv->lumaParam;
  79         FilterParam *chroma= &vf->priv->chromaParam;
  80
  81         mp_image_t *dmpi=vf_get_image(vf->next,mpi->imgfmt,
  82                 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
  83                 mpi->w,mpi->h);
  84
  85         if(mpi->flags&MP_IMGFLAG_PLANAR)
  86                 w= mpi->w;
  87         else
  88                 w= mpi->w * mpi->bpp/8;
  89
  90         interleave(dmpi->planes[0], mpi->planes[0],
  91                 w, mpi->h, dmpi->stride[0], mpi->stride[0], luma->interleave, luma->swap);
  92
  93         if(mpi->flags&MP_IMGFLAG_PLANAR){
  94                 int cw= mpi->w >> mpi->chroma_x_shift;
  95                 int ch= mpi->h >> mpi->chroma_y_shift;
  96
  97                 interleave(dmpi->planes[1], mpi->planes[1], cw,ch,
  98                         dmpi->stride[1], mpi->stride[1], chroma->interleave, luma->swap);
  99                 interleave(dmpi->planes[2], mpi->planes[2], cw,ch,
 100                         dmpi->stride[2], mpi->stride[2], chroma->interleave, luma->swap);
 101         }
 102
 103         return vf_next_put_image(vf,dmpi, pts);
 104 }
 105
 106 //===========================================================================//
 107
 108 static void parse(FilterParam *fp, char* args){
 109         char *pos;
 110         char *max= strchr(args, ':');
 111
 112         if(!max) max= args + strlen(args);
 113
 114         pos= strchr(args, 's');
 115         if(pos && pos<max) fp->swap=1;
 116         pos= strchr(args, 'i');
 117         if(pos && pos<max) fp->interleave=1;
 118         pos= strchr(args, 'd');
 119         if(pos && pos<max) fp->interleave=-1;
 120 }
 121
 122 static int vf_open(vf_instance_t *vf, char *args){
 123
 124         vf->put_image=put_image;
 125 //      vf->get_image=get_image;
 126         vf->priv=malloc(sizeof(struct vf_priv_s));
 127         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 128
 129         if(args)
 130         {
 131                 char *arg2= strchr(args,':');
 132                 if(arg2) parse(&vf->priv->chromaParam, arg2+1);
 133                 parse(&vf->priv->lumaParam, args);
 134         }
 135
 136         return 1;
 137 }
 138
 139 const vf_info_t vf_info_il = {
 140     "(de)interleave",
 141     "il",
 142     "Michael Niedermayer",
 143     "",
 144     vf_open,
 145     NULL
 146 };
 147
 148 //===========================================================================//